What file formats do you support?

We support over 100 file formats including images (JPG, PNG, GIF, WebP, TIFF), documents (PDF, DOC, DOCX, TXT), videos (MP4, AVI, MOV), audio (MP3, WAV, FLAC), and many more specialized formats.

Yes, absolutely. We use enterprise-grade encryption for all file transfers. Your files are automatically deleted from our servers after conversion, and we never store or access your personal data.

What is the maximum file size?

The maximum file size for free users is 100MB per file. Premium users can convert files up to 1GB. For larger files, we recommend our batch processing feature.

How long does conversion take?

Most files convert in under 30 seconds. The exact time depends on file size and format complexity. Our advanced algorithms ensure the fastest possible conversion while maintaining quality.

Can I convert multiple files at once?

Yes! Our batch processing feature allows you to upload and convert up to 50 files simultaneously. This is perfect for bulk conversions and saves significant time.

Do I need to create an account?

No account is required for basic conversions. However, creating a free account gives you access to batch processing, file history, and priority support.

CRW to PGM

Drag, drop, and convert your files with ease.

1. Add Your Files

Drag & drop or paste files here

CRW (Max. 10MB) • Up to 5 files in guest mode

Choose Files

Or upload from:

Temporary file processingFiles are uploaded for processing and are not retained as permanent storage. Read our File Processing & Retention Policy.

2. Conversion Settings

Convert From

Convert To

Image options

Width (px)

Height (px)

Strip image metadata (EXIF, etc.)

Advanced Options

Quality

Instant download after conversion

Why Choose Our Converter?

Quickly convert Canon CRW raw photos to simple PGM grayscale bitmaps for device sharing and legacy systems.

Fast Raw Decoding

Rapidly demosaic and decode CRW sensor data into a standard raster ready for PGM export.

Controlled Tonal Mapping

Adjust exposure and mapping to preserve midtones from CRW before flattening to grayscale PGM.

Wide Device Support

Produce PGM outputs readable by legacy viewers, printers, and embedded systems.

Batch Raw Processing

Convert multiple CRW files in groups while maintaining consistent tonal curve across the set.

Conversion Parameters

Set gamma, bit depth target and resize so PGM results match target device constraints.

Local Client Processing

Conversion runs in the browser memory buffers; files need not be uploaded to remote servers.

Frequently Asked Questions

Find answers to common questions about our file conversion service

Still have questions?

Can't find the answer you're looking for? Our support team is here to help.

Performance Estimates

Estimated conversion times based on typical hardware.

Conversion Speed Benchmarks

1-3 seconds

12 MP image processing

12 MP, 4000x3000

Fast

3-6 seconds

24 MP image processing

24 MP, 6000x4000

Moderate

8-15 seconds

48 MP image processing

48 MP, 8000x6000

Slow

Batch Conversion Estimates

Batch Size	Total Time	Avg per Image	Efficiency
10 images (12 MP each)	20-40 seconds	2-4 seconds	High
50 images (12 MP each)	1.5-3 minutes	1.8-3.6 seconds	High
100 images (12 MP each)	3-6 minutes	1.8-3.6 seconds	Moderate
200 images (12 MP each)	6-12 minutes	1.8-3.6 seconds	Moderate

Browser Compatibility

Format support across all major browsers

Support Across Browsers

Chrome

Supported

Full Support

Firefox

Supported

Full Support

Safari

Supported

Full Support

Edge

Supported

Full Support

Advanced Format Features Support

Features	Chrome	Firefox	Safari	Edge
Alpha Channel
ICC Profiles
EXIF Metadata
16-bit Depth

Device Compatibility

Seamless conversion across desktop, mobile and tablet

Desktop

Fast multi-core processing
Batch upload support

Mobile

Responsive mobile browser workflow
Instant photo conversion

Tablet

Full tablet browser support
Touch-friendly interface

Source vs Target Format

Key technical differences between formats

Feature	Source Format	Target Format
Compression	Proprietary raw (lossless sensor data)	Uncompressed/simple binary
File Size	Large (raw sensor + metadata)	Smaller for 8-bit, larger for 16-bit but simpler
Quality	High linear sensor data	Lossy mapping to grayscale
Transparency	N/A (no alpha)	N/A (single-channel)
Metadata	EXIF, maker notes, thumbnails	Minimal header only
Primary Use	Archival and color editing	Device display and legacy processing

How to Convert Files

Follow these simple steps to convert your files

Upload Source File

Select or drag and drop your CRW files.

Adjust Settings

Choose target bit depth (8/16), gamma and resize for intended device.

Convert

Click convert to demosaic CRW and map luminance into PGM in-browser.

Download Result

Save the PGM file; optionally export sidecar metadata before closing.

Ready to Convert Your Files?

Use our high-speed converter to process your images now.

Start Converting Now

Tips and Best Practices

Optimize your conversion workflow with technical recommendations.

CRW Preparation for Grayscale

Convert raw white balance in CRW before luminance extraction to avoid color casts affecting gray values
Apply the same demosaic algorithm to each CRW in a batch to keep tonal consistency across PGM outputs
Use exposure compensation on CRW when highlights clip, because PGM cannot recover clipped raw channels later
Export CRW thumbnails or save EXIF sidecars if you need camera metadata after PGM generation
If CRW contains multiple embedded JPEGs, choose the full raw decode rather than the preview to control tonal mapping

PGM Export Settings

Select 16-bit PGM when target devices or printers support high dynamic range to reduce posterization
Choose 8-bit PGM for maximum compatibility with simple viewers and embedded systems
Enable consistent gamma value during conversion so PGM lightness matches across OSes and viewers
Resize CRW to destination pixel dimensions before writing PGM to limit unnecessary file volume
Confirm PGM header width/height order for devices expecting rows-first binary layout

Validation & Device Testing

Preview the produced PGM at 100% to inspect shadow banding from bit-depth quantization
Test PGM on the target embedded viewer or printer to detect unsupported 16-bit handling
Compare histograms of CRW-derived luminance and final PGM to verify intended tonal transfer
Check rotation applied from CRW EXIF so device displays correct orientation without relying on metadata
Use a representative sample CRW from the same camera model to validate batch settings before full runs

Workflow Reliability & Privacy

Process sensitive CRW files locally to keep camera maker notes and location data on-device
Group CRW conversions into batches of 20-50 for efficient memory use and consistent output
Close other heavy browser tabs to avoid memory pressure that can interrupt demosaic routines
Download completed PGM files immediately and archive originals to prevent accidental overwrites
Keep a checksum of original CRW files before conversion if you need to verify lossless archival later

Fast Processing

Close unused tabs for maximum throughput.

Client-Side Privacy

No media leaves your device.

Broad Compatibility

Output files work across all operating systems.

Pro Tip

For batch conversions, process in groups of 20-50 files to optimize memory usage and avoid browser slowdowns.

Explore related conversion tools for image workflows

Related Conversion Tools

Explore our complete suite of image conversion tools. From basic format changes to advanced optimizations, we have everything you need for your image processing workflow.

Best Match